The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2019
Filed:
Nov. 03, 2014
Applicant:
Caterpillar Sarl, Geneva, CH;
Inventors:
Assignee:
Caterpillar SARL, Geneva, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/70 (2006.01); E02F 9/22 (2006.01); F02D 29/04 (2006.01); E02F 9/20 (2006.01); F02D 41/04 (2006.01); E02F 3/32 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2246 (2013.01); E02F 9/2066 (2013.01); E02F 9/2232 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F02D 29/04 (2013.01); F02D 41/04 (2013.01); E02F 3/32 (2013.01); F02D 2200/50 (2013.01);
Abstract
A work machine has a work device mounted on a machine body including a fluid pressure motor for travelling. A controller reduces engine speed to be lower than rated engine speed during normal working mode. The controller controls engine speed so as to obtain a pump flow rate in accordance with a target travelling speed during travelling low-load mode when engine load is lower than a threshold. The controller controls both the engine speed and output torque for pump control so that the engine output becomes maximum in travelling high-load mode when the engine load is higher than the threshold.